EP1172879B1 - Filtre passe-bande à double mode - Google Patents

Filtre passe-bande à double mode Download PDF

Info

Publication number
EP1172879B1
EP1172879B1 EP01116454A EP01116454A EP1172879B1 EP 1172879 B1 EP1172879 B1 EP 1172879B1 EP 01116454 A EP01116454 A EP 01116454A EP 01116454 A EP01116454 A EP 01116454A EP 1172879 B1 EP1172879 B1 EP 1172879B1
Authority
EP
European Patent Office
Prior art keywords
line
sides
shaped electrode
frame
electrode pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01116454A
Other languages
German (de)
English (en)
Other versions
EP1172879A3 (fr
EP1172879A2 (fr
Inventor
Naoki Mizoguchi, (A170) Intel. Property. Dept.
Hisatake Okamura, (A170) Intel. Property. Dept.
Seiji Kamba, (A170) Intel. Property. Dept.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to EP07023688A priority Critical patent/EP1914826A1/fr
Publication of EP1172879A2 publication Critical patent/EP1172879A2/fr
Publication of EP1172879A3 publication Critical patent/EP1172879A3/fr
Application granted granted Critical
Publication of EP1172879B1 publication Critical patent/EP1172879B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2135—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using strip line filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20354—Non-comb or non-interdigital filters
    • H01P1/20381—Special shape resonators

Definitions

  • the present invention relates to a dual mode band-pass filter for use as a band filter in a communication device to be operated in a microwave to millimeter wave band, and said dual mode band-pass filter.
  • Figs. 13 and 14 are schematic plan views showing conventional dual-mode band-pass filters, respectively.
  • a circular conductive film 201 is formed on a dielectric substrate (not shown).
  • An input-output coupling circuit 202 and an input-output coupling circuit 203 are coupled to the conductive film 201 so as to form an angle of 90° between them.
  • a top-open stub 204 is formed in the position forming a center angle of 45° to the location where the input-output coupling circuit 203 is disposed.
  • a substantially square conductive film 211 is formed on a dielectric substrate.
  • Input-output coupling circuits 212 and 213 are coupled to the conductive film 211 so as to form an angle of 90° to each other.
  • the corner portion positioned at an angle of 135° to the input-output coupling circuit 213 is lacked. With the lacked portion 211a, the resonance frequencies of the two resonance modes become different. The two resonance modes are coupled to each other, and thereby, the band-pass filter 210 operates as a dual-mode band-pass filter.
  • a dual-mode band-pass filter using a circular ring-shaped conductive film instead of the circular conductive film has been proposed (Japanese Unexamined Patent Application Publication No. 9-13961 , Japanese Unexamined Patent Application Publication No. 9-162610 , and so forth). That is, the dual mode filter is disclosed, in which a circular ring-shaped ring-transmission line is used, input-output coupling circuits are arranged so as to form a center angle of 90° between them, as well as those in the dual-mode band-pass filter shown in Fig. 13 , and moreover, a top-open stub is formed in a part of the ring-shaped transmission line.
  • the two-stage band-pass filter can be produced by formation of one conductive film pattern. Accordingly, the band-pass filters can be miniaturized.
  • the conductive film 201 has a circular shape.
  • the conductive film 211 has a substantially square shape. That is, the conductive films are limited to the shapes. Accordingly, there arises the problem that the design flexibility is low.
  • each of the above-described band-pass filters has the frequency band in only one resonance mode.
  • US-A-5703546 discloses a strip dual mode loop resonator including a loop-shaped strip line having a pair of straight strip lines arranged in parallel, an electric length of the loop-shaped strip line being equivalent to a wavelength of a microwave circulated in the loop-shaped strip line in two different directions according to a characteristic impedance of the loop-shaped strip line, and the straight strip lines being coupled to each other in electromagnetic coupling to change the characteristic impedance of the loop-shaped strip line.
  • the microwave is transferred from an input strip line to the loop-shaped strip line through electromagnetic field induced by the microwave. Thereafter, the microwave is reflected in the straight strip lines of the loop-shaped strip line to produce reflected microwaves circulated in opposite directions. Thereafter, the reflected waves are resonated and filtered in dual mode in the loop-shaped strip line. Thereafter, the microwave formed of the reflected waves is transferred from the loop-shaped strip line to an output strip line through electromagnetic field induced by the microwave.
  • JP 09-162610 teaches a dual mode resonator configured to be small in size by using two filters with different center frequencies and a resonator at a high frequency band.
  • Transmission lines are connected in a ring form, a characteristic impedance and an electric length of the opposite transmission line portions are equalized with each other.
  • the characteristic impedance of adjacent transmission lines is selected different from each other and exciting terminals of resonators are provided in each midpoint of the transmission lines.
  • the resonance frequency excited between two opposite of the exciting terminals is made different from the resonance frequency excited between the other exciting terminals and the two resonance states are orthogonal to each other.
  • independent resonance is attained and the small-sized dual mode resonator is realized with two filters whose center frequencies differ from each other.
  • a dual-mode band-pass filter there is provided according to claim 1.
  • Fig. 1 is a perspective view showing a dual-mode band-pass filter according to a comparative example.
  • Fig. 2 is a plan view schematically showing the essential part of the filter.
  • the dual-mode band-pass filter 1 has a dielectric substrate 2 having a rectangular plate shape.
  • a dielectric material to form the dielectric substrate 2 appropriate dielectric materials such as synthetic resins, e.g., fluororesins, and other ceramic materials may be used.
  • the thickness of the dielectric substrate 2 has no particular limitations. In Fig. 1 , the thickness is set at 300 ⁇ m.
  • a frame-shaped metal film 3 is formed on the upper face 2a of the dielectric substrate 2 to form a resonator.
  • the frame-shaped electrode pattern 3 is formed on a part of the upper face 2a of the dielectric substrate 2, is a line-shaped electrode having a substantially constant line-width from the starting point to the end point thereof, and has a rectangular ring-shape in which the starting point is connected to the end point.
  • the external form is a square of 2.0 x 2.0 mm.
  • the line widths of the line-shaped electrodes are different between one pair of two opposed sides 3a and 3b and the other pair of two opposed sides 3c and 3d. That is, the line-width with respect to the sides 3a and 3b is 200 ⁇ m.
  • the line-width of the part along each of the sides 3c and 3d is 100 ⁇ m.
  • the line-width is defined as the size in width-direction of the metal film part along each side of the rectangular frame-shaped metal film 3.
  • the line-width with respect to the sides 3a and 3b is 200 ⁇ m, and the line-width of the part along each of the sides 3c and 3d is 100 ⁇ m. That is, for the purpose of coupling the two resonance modes caused in the electrode pattern 3, the line-widths are set to be different between the sides 3a and 3b and the sides 3c and 3d. In other words, the line-widths of the parts along the sides 3a and 3b and those of the parts along the sides 3c and 3d are selected so that the two resonance modes having different resonance frequencies are caused in the frame-shaped electrode pattern 3 for forming a resonator, and the two resonance modes are degeneration-coupled to each other to produce a band-pass filter. This will be described later based on concrete experimental data.
  • a ground electrode 4 is formed on the whole of the under face of the dielectric substrate 2.
  • Input-output coupling circuit electrodes 5 and 6 are arranged for the electrode pattern 3 having a predetermined gap between them, respectively.
  • the input-output coupling circuit electrodes 5 and 6 are made of metal films arranged via predetermined gaps for a pair of the sides 3c and 3d of the electrode pattern 3 on the upper face of the dielectric substrate 2, respectively, though not particularly shown. That is, the input-output coupling circuit electrodes 5 and 6 are capacitance-coupled to the electrode pattern 3.
  • the nodes of the input-output coupling circuit electrodes 5 and 6 are positioned on the sides 3c and 3d, a 50 ⁇ m distance from the ends of the side 3a, respectively.
  • Fig. 3 is a graph showing the frequency characteristics of the dual-mode band-pass filter 1 of Fig. 1 .
  • solid line A represents the reflection characteristic
  • broken line B represents the transmission characteristic.
  • the band-pass filter is formed, in which the band shown by arrow C is a transmission band, as shown in Fig. 3 .
  • the frame-shaped electrode-pattern 3 is configured as described above, the two resonance modes are coupled to each other, and therefore, a characteristic required for the dual-mode band-pass filter can be obtained.
  • the resonance mode propagating in the direction passing through the sides 3a and 3b, and that propagating in the direction passing through the sides 3a and 3b are generated.
  • the line-widths of the parts along the sides 3a and 3b and the line-widths of the parts along the sides 3c and 3d are selected so that these two resonance modes are degeneration-coupled to each other.
  • inductance L is loaded in the direction along the sides 3a and 3b of the frame-shaped electrode-pattern 3.
  • the line-widths of the frame-shaped electrode-pattern 3 are adjusted so that the two resonance modes are coupled to each other in the parts along the sides 3a and 3b and the parts along the sides 3c and 3d.
  • a characteristic required for the band-pass filter can be easily attained, and moreover, the band-width C can be easily controlled by adjustment of the size of the above line-widths.
  • Fig. 4 illustrates the frequency characteristics obtained when the coupling positions of the input-output circuits 5 and 6 are changed.
  • alternate long and short dash line E and solid line F represent the reflection characteristic and the transmission characteristic, respectively, obtained when the coupling points of the input-output coupling circuit electrodes are shifted on the sides 3c and 3d, 400 ⁇ m upward along the sides 3c and 3d.
  • alternate long and two short dash line G and broken line H represent the reflection and transmission characteristics shown in Fig. 3 .
  • the band-width and the center frequency can be easily controlled by changing the positions of the coupling points of the input-output circuits 5 and 6.
  • Fig. 5 shows the reflection and transmission characteristics, obtained when the line-widths of the parts along the sides 3a and 3b are the same as those of the above-described filter, and the line-widths of the parts along the sides 3c and 3d are 80 ⁇ m, 100 ⁇ m (the same as that in the filter of Fig. 3 ), and 120 ⁇ m.
  • the band-widths can be easily controlled by changing the line-widths.
  • Fig. 6 shows variations in frequency characteristic, obtained when the fineness ratio of the frame-shaped electrode pattern 3 of the dual-mode band-pass filter of Fig. 1 is changed.
  • Fig. 6 shows the reflection characteristics and the transmission characteristics, obtained when the lengths of the sides 3a and 3b are constant, that is, are 2 mm, and the lengths of the sides 3c and 3d are 1.4 mm, 1.7 mm, and 2.0 mm.
  • the line-widths of the parts along the sides 3a and 3b are 200 ⁇ m
  • the line-widths of the parts along the sides 3c and 3d are 200 ⁇ m.
  • the changes in characteristic shown in Fig. 6 support that the dual-mode band-pass filter is formed by changing the line-widths and the shape of the frame-shaped electrode pattern, using the loading of the inductance as in Fig. 1 .
  • the band-width can be easily controlled by adjusting the size of the line-width in the frame-shaped electrode-pattern 3, and moreover, the frequency of the attenuation pole can be easily controlled by changing the positions of the input-output coupling points.
  • the two resonance modes having different resonance frequencies are coupled to each other by addition of an inductance load-component to the line-shaped electrodes comprising two opposed sides.
  • the two resonance modes having difference resonance frequencies may be coupled to each other by addition of a capacitance component to two opposed sides.
  • Fig. 7 is a schematic plan view showing the essential part of a dual-mode band-pass filter according to an embodiment of the present invention.
  • the filter is configured in the same manner as the dual-mode band-pass filter 1 of Fig. 1 excepting that the shape of the frame-shaped electrode pattern is different from that of Fig. 1 .
  • one pair of sides 13c and 13d of a frame-shaped electrode pattern 13 perpendicular to the other pair of sides 13a and 13b of the frame-shaped electrode pattern 13 have relatively thick line-width parts 13c 1 and 13d 1 , and relatively thin line-width parts 13c 2 and 13d 2 , respectively.
  • the lengths of the sides 13a to 13d are 2.0 mm, and the line-widths of the parts along the sides 13a and 13b are 200 ⁇ m.
  • the line-widths of the relatively thick line-width parts 13c 1 and 13d 1 are 200 ⁇ m, and the line-widths of the relatively thin line-width parts along the sides 13c 2 and 13d 2 are 50 ⁇ m.
  • the lengths of the relatively thin line-width parts 13c 1 and 13d 1 are 600 ⁇ m, and those of the relatively thin line-width parts 13c 2 and 13d 2 are 1000 ⁇ m. That is, in a pair of the sides 13c and 13d of the frame-shaped electrode pattern 13, the parts 13c 1 and 13d 1 to which a capacitance is loaded, and the parts 13c 2 and 13d 2 to which an inductance is loaded are formed.
  • Fig. 8 shows the frequency characteristic of a dual-mode band-pass filter 11 of this embodiment.
  • the broken line and the solid line represent the reflection and transmission characteristics, respectively.
  • the line-width of the frame-shaped electrode pattern is changed.
  • the characteristics as the band-pass filter can be also obtained by reducing the width of a part of the sides to form the relatively thick line-width parts 13c 1 and 13d 1 and the relatively thin line-width parts 13c 2 and 13d 2 .
  • the line-width and the shape of the frame-shaped electrode pattern may be modified in various forms, provided that the two resonance modes, produced in the frame-shaped electrode pattern in this embodiment, are coupled to each other.
  • Fig. 9 is a schematic plan view showing the essential part of the dual-mode band-pass filter
  • Concavities 23e and 23f are formed in a part of the sides 23c and 23d of a frame-shaped electrode pattern 23.
  • the line-widths of the parts along the sides 23a and 23b are equal to those of the sides 23c and 23d, that is, they are 200 ⁇ m.
  • Fig. 10 shows the frequency characteristic of a dual-mode band-pass filter according to Fig. 9 .
  • the broken line and the solid line represent the reflection and transmission characteristics, respectively. The characteristics are obtained when the width X of the concavities 23e and 23f (see Fig. 10 ) is 400 ⁇ m, and the depth Y is 700 ⁇ m.
  • the two resonance modes are coupled to each other, and thereby, a characteristic required for the band-pass filter is obtained.
  • Fig. 11 is a schematic plan view showing the essential part of a dual mode • band-pass filter.
  • an electrode pattern 33 having a rhombic outside-shape instead of the rectangular electrode pattern is provided in the dual-mode band-pass filter 31 of Fig. 11 .
  • the configuration is the same as that of the dual-mode band-pass filter 1 of Fig. 1 .
  • the input-output coupling circuit electrodes 5 and 6 are capacitance-coupled to a part of the sides 33a and 33b of a frame-shaped electrode pattern 33.
  • the sides 33a, 33b, 33c, and 33d are inclined so that the line-widths become thinner and thinner toward the vertexes 33e and 33f lying at both of the ends thereof in the lateral direction in Fig. 11 .
  • the line-widths of the parts along the sides 33a to 33d are made to change gradually so as to form a tapered electrode. Thereby, the two resonance modes are coupled to each other, and a characteristic required for the band-pass filter can be obtained.
  • the above-described gradation of the line-width is selected so that the resonance mode propagating in the direction passing through the vertexes 33e and 33f and that propagating in the direction passing through the other two vertexes 33g and 33h can be coupled to each other.
  • Fig. 12 is a graph showing the frequency characteristic of the dual-mode band-pass filter of Fig. 11 .
  • the broken line and solid lines represent the reflection and transmission characteristics, respectively.
  • the characteristics shown in Fig. 12 are obtained when, regarding the electrode pattern 33, the size in the direction passing through the vertexes 33e and 33f is 2.4 mm, the size in the direction passing through the vertexes 33g and 33h is 2.4 mm, the line-widths at the vertexes 33e and 33f are 100 um, and the line-widths at the vertexes 33g and 33h are 200 ⁇ m.
  • the two resonance modes having different resonance frequencies from each other are coupled, so that a characteristic required for the band-pass filter can be obtained.
  • the two resonance modes are coupled to each other by changing the line-width and shape of the electrode pattern 33, as well as in the first embodiment.
  • the frequency of the attenuation pole can be controlled by shifting the coupling points of the input-output circuits 5 and 6.
  • the band-width can be easily controlled by changing the line-width and the shape.
  • the input-output circuits 5 and 6 don't always need to be arranged so as to form a center angle of 90° with respect to the center of the metal film 33. Accordingly, the design flexibility for the dual-mode band-pass filter can be significantly enhanced, like the filter in Fig. 1 .
  • Fig. 15 is a plan view of a comparative example of a dual-mode band-pass filter.
  • a dual-mode band-pass filter 41 has an rectangular electrode pattern 43 having four line-shaped electrodes 43a to 43d.
  • Input-output coupling circuit electrodes 45 and 46 are coupled to the line-shaped electrode 43c and 43d via capacitors, respectively.
  • the velocities of a current flowing in the inner-edge and outer-edge sides of the circle are different from each other. That is, this current velocity difference causes the loss of a high frequency signal.
  • the electrode pattern 43 is a rectangular electrode pattern having the four line-shaped electrodes, the velocities of currents flowing in the inner and outer edge sides of the four sides are the same. In this part, substantially no loss of a high frequency is caused.
  • the four corners of the frame-shaped electrode pattern 43 are camfered so that the outer edge shapes of the respective corner portions become polygonal. Thereby, a high frequency signal can be easily transmitted there. That is, the difference between the current velocities in the inner edge and outer edge sides of the frame-shaped electrode pattern can be adjusted in these corner portions. Moreover, since the current velocity difference is adjusted in the four corner portions, the adjustment can be easily performed as compared with that of the circular electrode pattern.
  • the four corner portions 47 may be rounded so that the outer edges have a curved line shape.
  • the capacitances in the relevant parts are changed.
  • the resonance frequency is slightly enhanced.
  • the insertion loss is sufficiently reduced, so that the characteristic required for the band pass filter is improved. That is, the bend-working of the outer edges satisfactorily improves the signal loss.
  • the line-width and shape of the frame-shaped electrode pattern is selected so that the two resonance modes produced in the frame-shaped electrode pattern constituting a resonator can be coupled to each other. Therefore, when an input voltage is applied via the input-output coupling circuit electrodes, the two resonance modes produced in the frame-shaped electrode pattern are coupled. Thus, a characteristic required for the band-pass filter can be obtained.
  • the attenuation pole can be easily controlled by adjustment of the positions of the coupling points of the input-output coupling circuit electrodes.
  • the band-width can be easily controlled by adjusting the line-width and shape of the frame-shaped electrode pattern, that is, by loading a capacitance or inductance component to the line-shaped electrodes.
  • the positions of the coupling points of the input-output circuits with respect to the metal film are not particularly limited.
  • a desired band-width and frequency characteristic can be easily realized, and the design flexibility for the dual-mode band-pass filter can be significantly enhanced.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (1)

  1. Filtre passe-bande à mode double, comprenant :
    un substrat diélectrique ;
    un motif d'électrode en forme de cadre (13) formé sur une face principale du substrat diélectrique ou à l'intérieur du substrat diélectrique à une hauteur dans celui-ci, ledit motif d'électrode en forme de cadre (13) étant une électrode de forme linéaire (13) depuis un point de départ jusqu'à un point final, ledit point de départ et ledit point final étant connectés l'un à l'autre ;
    une électrode de masse formée à l'intérieur du substrat diélectrique ou sur une face principale du substrat diélectrique de manière à se trouver à l'opposé du motif d'électrode en forme de cadre (13) via une partie du substrat diélectrique ; et
    des électrodes d'entrée/sortie pour circuit de couplage (5, 6) couplées de manière capacitive au motif d'électrode en forme de cadre (13),
    au moins une portion de chargement de capacité et une portion de chargement d'inductance qui sont formées dans une partie de l'électrode de forme linéaire (13) de sorte que deux modes de résonance ayant des fréquences de résonance différentes l'un de l'autre et générés au niveau du motif d'électrode en forme de cadre (13) sont couplés l'un à l'autre,
    dans lequel ledit motif d'électrode en forme de cadre (13) comporte quatre côtés,
    dans lequel, pour former l'une au moins parmi la portion de chargement de capacité et la portion de chargement d'inductance, le motif d'électrode en forme de cadre comprend une première paire de côtés opposés (13c, 13d) perpendiculaires à une seconde paire de côtés opposés (13a, 13b), de sorte que la largeur de chacun des côtés de la première paire de côtés (13c, 13d) change exactement une fois le long de leur longueur, et chaque côté de la première paire de côtés (13c, 13d) comprend une partie avec une largeur de ligne relativement épaisse (13c1, 13d1) et une partie avec une largeur de ligne relativement mince (13c2, 13d2), les parties avec une largeur de ligne relativement épaisse étant jointives aux mêmes côtés (13a, 13b), et les parties avec une largeur de ligne relativement épaisse sont opposées l'une à l'autre et les parties avec une largeur de ligne relativement mince sont opposées l'une à l'autre, et les largeurs de ligne des côtés de la seconde paire de côtés (13a, 13b) sont les mêmes et sont constantes le long de leur longueur, et la largeur des parties avec une largeur de ligne relativement épaisse (13c2, 13d2) est égale à la largeur de ligne de la seconde paire de côtés (13a, 13b), et
    dans lequel des points de couplage, auxquels les électrodes de couplage d'entrée/sortie (5, 6 ; 45, 46) sont couplées au motif d'électrode en forme de cadre (3 ; 13 ; 43), sont agencés pour être sur un côté et en écartement d'une ligne droite imaginaire qui passe par les points centraux de deux côtés opposés parmi les quatre côtés.
EP01116454A 2000-07-12 2001-07-06 Filtre passe-bande à double mode Expired - Lifetime EP1172879B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07023688A EP1914826A1 (fr) 2000-07-12 2001-07-06 Filtre à bande passante à deux modes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000211662A JP3587139B2 (ja) 2000-07-12 2000-07-12 デュアルモード・バンドパスフィルタ
JP2000211662 2000-07-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07023688A Division EP1914826A1 (fr) 2000-07-12 2001-07-06 Filtre à bande passante à deux modes

Publications (3)

Publication Number Publication Date
EP1172879A2 EP1172879A2 (fr) 2002-01-16
EP1172879A3 EP1172879A3 (fr) 2003-05-21
EP1172879B1 true EP1172879B1 (fr) 2009-11-18

Family

ID=18707726

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07023688A Ceased EP1914826A1 (fr) 2000-07-12 2001-07-06 Filtre à bande passante à deux modes
EP01116454A Expired - Lifetime EP1172879B1 (fr) 2000-07-12 2001-07-06 Filtre passe-bande à double mode

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07023688A Ceased EP1914826A1 (fr) 2000-07-12 2001-07-06 Filtre à bande passante à deux modes

Country Status (5)

Country Link
US (2) US6545568B2 (fr)
EP (2) EP1914826A1 (fr)
JP (1) JP3587139B2 (fr)
KR (1) KR100397742B1 (fr)
DE (1) DE60140505D1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3395754B2 (ja) * 2000-02-24 2003-04-14 株式会社村田製作所 デュアルモード・バンドパスフィルタ
JP3587139B2 (ja) * 2000-07-12 2004-11-10 株式会社村田製作所 デュアルモード・バンドパスフィルタ
JP2004297764A (ja) 2003-03-07 2004-10-21 Murata Mfg Co Ltd バンドパスフィルタ
US7443271B2 (en) 2003-05-22 2008-10-28 The Circle For The Promotion Of Science And Engineering Ring filter wideband band pass filter using therewith
US7457651B2 (en) * 2003-09-30 2008-11-25 Telecom Italia S.P.A. Dual mode filter based on smoothed contour resonators
JP4284245B2 (ja) * 2004-07-12 2009-06-24 三菱電機株式会社 分布定数フィルタ
TWI318047B (en) * 2006-08-04 2009-12-01 Hon Hai Prec Ind Co Ltd Band-pass filter
US7688162B2 (en) * 2006-11-16 2010-03-30 Harris Stratex Networks, Inc. Hairpin microstrip bandpass filter
TWI383536B (zh) * 2008-10-31 2013-01-21 Hon Hai Prec Ind Co Ltd 帶通濾波器
FR2938379A1 (fr) * 2008-11-07 2010-05-14 Commissariat Energie Atomique Dispositif de filtrage differentiel a resonateurs couples coplanaires et antenne filtrante munie d'un tel dispositif
DE102009038148B4 (de) * 2009-08-20 2014-04-03 Continental Automotive Gmbh Triplexer für ein Multiband-Antennenmodul eines Fahrzeugs

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571777B1 (fr) 1992-04-30 1998-07-01 Matsushita Electric Industrial Co., Ltd. Résonateur en boucle du type ligne à bande à double mode et filtre passe-bande composé des résonateurs
US5400002A (en) * 1992-06-12 1995-03-21 Matsushita Electric Industrial Co., Ltd. Strip dual mode filter in which a resonance width of a microwave is adjusted and dual mode multistage filter in which the strip dual mode filters are arranged in series
JP2906863B2 (ja) 1992-09-28 1999-06-21 松下電器産業株式会社 ストリップ線路デュアル・モード・フィルタ
US5805034A (en) * 1995-03-17 1998-09-08 Lucent Technologies Inc. Microstrip patch filters
JP3304724B2 (ja) 1995-11-16 2002-07-22 松下電器産業株式会社 デュアルモードフィルタ
JPH09162610A (ja) 1995-12-14 1997-06-20 Matsushita Electric Ind Co Ltd デュアルモード共振器
DE19831161A1 (de) * 1998-07-11 2000-01-27 Bosch Gmbh Robert Dual-Mode Ringresonator
JP2001102806A (ja) * 1999-09-30 2001-04-13 Ikuo Awai デュアルモードフィルタ及びその設計方法
JP3587139B2 (ja) * 2000-07-12 2004-11-10 株式会社村田製作所 デュアルモード・バンドパスフィルタ
JP3804481B2 (ja) * 2000-09-19 2006-08-02 株式会社村田製作所 デュアルモード・バンドパスフィルタ、デュプレクサ及び無線通信装置

Also Published As

Publication number Publication date
KR100397742B1 (ko) 2003-09-13
EP1172879A3 (fr) 2003-05-21
US20030076201A1 (en) 2003-04-24
KR20020006490A (ko) 2002-01-19
US6545568B2 (en) 2003-04-08
US20020005770A1 (en) 2002-01-17
DE60140505D1 (de) 2009-12-31
EP1914826A1 (fr) 2008-04-23
JP3587139B2 (ja) 2004-11-10
US6630875B2 (en) 2003-10-07
EP1172879A2 (fr) 2002-01-16
JP2002026606A (ja) 2002-01-25

Similar Documents

Publication Publication Date Title
EP0844682A1 (fr) Filtre du type ligne à bande planaire et résonateur bi-mode
EP1643585B1 (fr) Filtre passe-bande à double mode
EP1172879B1 (fr) Filtre passe-bande à double mode
EP1134833B1 (fr) Méthode d'ajustement de la fréquence d'un pôle d'atténuation d'un filtre passe-bande bi-mode
EP1926174B1 (fr) Filtre à bande passante à deux modes
US6897745B2 (en) Resonator and filter
EP1170819B1 (fr) Filtre passebande bimode
JP3589008B2 (ja) 誘電体共振器及びそれを用いたフィルタ、共用器、ならびに通信機装置
JP3013798B2 (ja) 交差線路
US7274273B2 (en) Dielectric resonator device, dielectric filter, duplexer, and high-frequency communication apparatus
EP1863117B1 (fr) Procédé pour la production d'un filtre de bande passante et filtre de bande passante
JP2004312287A (ja) 誘電体共振器、誘電体フィルタ、複合誘電体フィルタおよび通信装置
JP4438253B2 (ja) バンドパスフィルタの特性調整方法
EP0869573B1 (fr) Filtre diélectrique et appareil de communication l'utilisant
EP1174943B1 (fr) Filtre passebande bimode
JP2002261508A (ja) デュアルモード・バンドパスフィルタ並びにデュプレクサ及び無線通信装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010706

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20070518

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MURATA MANUFACTURING CO., LTD.

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60140505

Country of ref document: DE

Date of ref document: 20091231

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100819

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100706

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100706

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120704

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140201

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60140505

Country of ref document: DE

Effective date: 20140201